Alarm clock



FIG. 1 is a left front perspective view of an alarm clock, showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a front elevational view; and

FIG. 5 is a top plan view thereof. 

The ornamental design for an alarm clock, as shown and described. 